UDOARTS Heart Rate Monitor with Chest Strap REAL-TIME HEART RATE DATA FOR ACTIVITIES - Displays continuous heart rate, average heart rate value and sports time to keep your fitness training smart and simple PROFESSIONAL GEAR -Helps people achieve exercise goals based on heart rate- receives wirelessly heartbeat signal transmitted from the heart rate chest strap FASHIONABLE AND HUMANIZED DESIGN- Provides nature and cloud series-Wears the watch on your wrist or fixes it on bicycle- Allows you to get the best pose and condition for running, cycling, climbing, etc. MORE ACCURATE WAY ON THE MARKET- Monitors heart rate with the chest strap to get the most accurate value- Includes the heart rate chest strap 2 made of soft fabric material that perfectly and comfortably adapts to your body shape ONE SIZE FITS MOST-The chest strap can be stretched from 60cm to 145cm